1 to keep an egg at the right temperature so that it can develop and produce a bird (hatch) 孵；孵育；孵化

2 [I,T] (used about a disease) to develop without showing signs; (used about a person or an animal) to carry a disease without showing signs （指疾病）潜伏；（指人或动物）带有潜伏的疾病: Some viruses take weeks to incubate. 有些病毒要几个星期才能培养出来。